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    • 4. 发明申请
    • POLYETHYLENE COMPOSITION FOR PIPE APPLICATIONS WITH IMPROVED SAGGING AND EXTRUSION PROPERTIES
    • 用于具有改进的挤压和挤出特性的管道应用的聚乙烯组合物
    • WO2016206768A1
    • 2016-12-29
    • PCT/EP2016/000498
    • 2016-03-22
    • ABU DHABI POLYMERS CO. LTD. (BOROUGE) L.L.C.BOREALIS AG
    • TYNYS, AnttiADHYATMA BHATTAR, Mohana MuraliHARJUNTAUSTA, Jarmo
    • C08L23/04
    • C08L23/04C08K3/04C08L23/06C08L23/0815C08L2203/18F16L9/12
    • The present invention relates to a polyethylene composition comprising, a base resin (A) comprising a copolymer of ethylene and at least one comonomer selected from alpha-olefins having from three to twelve carbon atoms, wherein the ethylene copolymer comprises a low molecular weight component (A-1) and a high molecular weight component (A-2) with the low molecular weight component (A-1) having a lower weight average molecular weight than the high molecular weight component (A- 2), (B) carbon black in an amount of 1.0 to 10 wt% based on the total amount of the polyethylene composition, and (C) optional further additives other than carbon black; wherein the low molecular weight component (A-1) has a melt flow rate MFR 2 (190°C, 2.16 kg) of equal to or more than 150 g/10 min to equal to or less than 400 g/10 min, determined according to ISO 1133, the base resin (A) has a density of equal to or more than 943 kg/m 3 to equal to or less than 957 kg/m 3 , determined according to ISO 1183, and the composition has a melt flow rate MFR 5 (190°C, 5 kg) of equal to or more than 0.14 g/10 min to equal to or less than 0.30 g/10 min, determined according to ISO 1133, a viscosity at a constant shear stress of 747 Pa, eta 747 , of equal to or more than 800 kPa*s to equal to or less than 1300 kPa*s, and complies with the in-equation (I) eta 747 > -1800 x MFR 5 + 1200 (I), a process for producing said polyethylene composition and an article comprising said polyethylene composition.
    • 本发明涉及一种聚乙烯组合物,其包含基础树脂(A),其包含乙烯和至少一种选自具有3至12个碳原子的α-烯烃的共聚单体的共聚物,其中所述乙烯共聚物包含低分子量组分 A-1)和低分子量成分(A-2)的高分子量成分(A-2),低分子量成分(A-1)的重均分子量低于高分子量成分(A-2),(B) 相对于聚乙烯组合物的总量为1.0〜10重量%,(C)除炭黑以外的任意的其他添加剂; 其中低分子量组分(A-1)的熔体流动速率MFR2(190℃,2.16kg)等于或大于150g / 10min至等于或小于400g / 10min,根据 根据ISO 1133,根据ISO 1183测定,基础树脂(A)的密度等于或大于943kg / m 3至等于或小于957kg / m 3,并且组合物具有熔体流动速率MFR5( 190℃,5kg)等于或大于0.14g / 10min至等于或小于0.30g / 10min,根据ISO 1133测定,恒定剪切应力下的粘度为747Pa,eta747,为 等于或大于800kPa·s至等于或小于1300kPa·s,并且符合等式(I)eta747> -1800×MFR5 + 1200(I),制备所述聚乙烯组合物的方法和 包含所述聚乙烯组合物的制品。